I rode a horse of milk white jade

the long version

When Oyuna was a baby, a horse accidentally crushed her foot, cursing her family with bad luck. Oyuna vows to restore good fortune to her family...but how? One fateful day, soldiers from the great Khan's army invade her village to steal horses and gather new soldiers. In hopes of bringing honor to her family, Oyuna courageously disguises herself as a boy and joins the soldiers on their quest. With only her horse and her cat to keep her company, Oyuna sets off on an amazing journey across deserts and mountains-a journey that will change her life forever.